INA139_17 Datasheet, PDF (1/25 Pages) Texas Instruments – High-Side Measurement Current Shunt Monitor

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
Reference
Design
INA139, INA169
SBOS181E – DECEMBER 2000 – REVISED DECEMBER 2015
INA1x9 High-Side Measurement Current Shunt Monitor
1 Features
•1 Complete Unipolar High-side Current
Measurement Circuit
• Wide Supply and Common-Mode Range
• INA139: 2.7 V to 40 V
• INA169: 2.7 V to 60 V
• Independent Supply and Input Common-Mode
Voltages
• Single Resistor Gain Set
• Low Quiescent Current: 60 µA (Typical)
• 5-Pin, SOT-23 Packages
2 Applications
• Current Shunt Measurement:
– Automotive, Telephone, Computers
• Portable and Battery-Backup Systems
• Battery Chargers
• Power Management
• Cell Phones
• Precision Current Source
3 Description
The INA139 and INA169 are high-side, unipolar,
current shunt monitors. Wide input common-mode
voltage range, high-speed, low quiescent current, and
tiny SOT-23 packaging enable use in a variety of
applications.
Input common-mode and power-supply voltages are
independent and can range from 2.7 V to 40 V for the
INA139 and 2.7 V to 60 V for the INA169. Quiescent
current is only 60 µA, which permits connecting the
power supply to either side of the current
measurement shunt with minimal error.
The device converts a differential input voltage to a
current output. This current is converted back to a
voltage with an external load resistor that sets any
gain from 1 to over 100. Although designed for
current shunt measurement, the circuit invites
creative applications in measurement and level
shifting.
Both the INA139 and INA169 are available in 5-pin
SOT-23 packages, and are specified for the –40°C to
85°C temperature range.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA139
INA169
SOT-23 (5)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
V_IN+
Up to 60V
Typical Application Circuit
R_S
I_S
3
V_IN+
1kΩ
4
V_IN–
1kΩ
Load
V+
5
GND
2
OUT
1
V_O = I_SR_SR_L/1kΩ
R_L
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.